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AssigneeFina Technology, Inc.
InventorsMichael A. McLeod, John Ashbaugh, Michael Musgrave
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A polypropylene material may be prepared from a blend of heterophasic propylene copolymers and propylene homopolymers. The material may be prepared by blending the polymers while they are in a molten state, and forming a film or sheet from the polymer blend. The materials may also be formed as coextruded materials or as ternary blends with a polyethylene or a single phase random propylene copolymer. The blends and neat polymers have particular application to forming slit film tapes and similar materials. The resultant materials may exhibit increased tenacity, elongation and toughness and greater surface roughness as compared to those materials prepared solely from propylene homopolymers.
A polypropylene fiber, film, or sheet comprising a melt blended admixture of a heterophasic propylene copolymer and an isotactic propylene homopolymer
A polypropylene fiber, film, or sheet comprising a melt blended admixture of a heterophasic propylene copolymer;
A composition comprising a melt blended admixture of a heterophasic propylene copolymer;
16 A polypropylene material compromising a three layer coextruded film or sheet prepared by the coextrusion of a first layer, a second or middle layer, and a third layer, wherein each layer is prepared using a material selected from the group consisting of a heterophasic propylene copolymer;
The three layer coextruded film or sheet of claim 16 wherein the second or middle layer is prepared using an isotactic propylene homopolymer and the first layer and third layer are prepared using a heterophasic propylene copolymer.
The three layer coextruded film or sheet of claim 16 wherein the second or middle layer is prepared using a melt blended admixture of a heterophasic propylene copolymer and an isotactic propylene homopolymer
The three layer coextruded film or sheet of claim 16 wherein the second or middle layer is prepared using a melt blended admixture of a heterophasic propylene copolymer;
The three layer coextruded film or sheet of claim 16 wherein the first layer is a heterophasic propylene copolymer;
Dependencies are inferred from the claim text.